JP2010099882A - Embossing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight embossing device capable of inexpensively performing embossing. <P>SOLUTION: The embossing device 1 for embossing a screen 10 includes an electroformed mold 31 which has an embossed pattern formed and transfers the embossed pattern to the screen 10, a pair of rotating rolls 32, 33 having the electroformed mold 31 wound, and a support roll 24 disposed opposite to the one side rotating roll 32 of the pair of rotating rolls 32, 33. The electroformed mold 31 circulates around the outer periphery of the pair of rotating rolls 32, 33 and transfers the embossed pattern to the screen 10 supported by the support roll 24. Therefore, it is not necessary to use an embossing roll having a large diameter, and rotating rolls 32, 33 having a small diameter are used, and therefore it is not necessary to remodel the embossing device 1, and therefore the screen 10 can be inexpensively embossed without enlarging the size. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an embossing apparatus.

2. Description of the Related Art Conventionally, an embossing apparatus that forms a three-dimensional shape on a work material such as paper, a metal thin plate, or a plastic film is known (see, for example, Patent Document 1).
The embossing apparatus described in Patent Document 1 includes an embossing roll in which an embossing pattern is formed on the outer peripheral surface of a substrate roll, and a receiving roll that is disposed to face the embossing roll. When the work material is pressed by the embossing roll and the receiving roll, the emboss pattern is transferred to the work material.

JP 2007-92196 A

  By the way, there are embossing rolls having a large diameter or a small diameter depending on the size of the material to be processed. As the size of the material to be processed increases, the cylindrical embossing roll increases in the radial direction. . Therefore, the embossing roll having a larger diameter is likely to interfere with a member disposed adjacent to the embossing apparatus, and the embossing apparatus needs to be modified. That is, there is a problem that the embossing apparatus is increased in size and cost.

  An object of the present invention is to provide an embossing apparatus capable of embossing at a low cost without increasing the size.

  The embossing apparatus of the present invention is an embossing apparatus for embossing a workpiece material, wherein the embossing pattern is formed, the transfer sheet for transferring the embossing pattern to the workpiece material, and the transfer sheet being wound. A pair of rotating rolls and a support member arranged to face one first rotating roll of the pair of rotating rolls, and the transfer sheet orbits around the outer periphery of the pair of rotating rolls, The emboss pattern is transferred to the work material supported by the support member.

  According to the present invention, a transfer sheet on which an emboss pattern is formed is wound around a pair of rotating rolls, and the transfer sheet orbits around the outer periphery of the pair of rotating rolls to emboss the work material supported by the support member. Transfer the pattern. As a result, a pair of rotating rolls whose size is increased only in a predetermined direction can be used in the gap of the embossing device without using a conventional embossing roll enlarged in the radial direction. can do. That is, since it is not necessary to modify the embossing apparatus, the material to be processed can be embossed at a low cost without increasing the size.

  For example, when a screen is employed as the material to be processed and the Fresnel shape is embossed on the screen, an embossing roll having the same circumferential dimension as the long or short side dimension of the screen is required. As the screen size increases in recent years, the circumferential dimension of the embossing roll also increases, but instead of this large-diameter embossing roll, the pair of rotating rolls described above have the same size as the long or short side of the screen. If a transfer sheet having a circumferential dimension is wound, it is not necessary to use an embossing roll having a large diameter. That is, since a rotating roll having a smaller diameter than that of the embossing roll is used, it is possible to emboss a large screen at a low cost without increasing the size of the rotating roll.

In this invention, it is preferable to provide the drive mechanism which adjoins and separates the other 2nd rotation roll of a pair of said rotation roll with respect to the said 1st rotation roll.
According to the present invention, since the second rotating roll is close to and separated from the first rotating roll, the transfer sheet corresponding to the size of the material to be processed is wound around the pair of rotating rolls, and the second rotating roll is What is necessary is just to make it adjoin and space apart to a 1st rotation roll. Therefore, when changing the size of the material to be processed, the transfer sheet corresponding to the size of the material to be processed is wound around a pair of rotating rolls, and the second rotating roll is only moved close to and away from the first rotating roll. The work material can be embossed with an easy operation.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.
[Configuration of embossing equipment]
FIG. 1 is a schematic view showing an embossing device 1 according to the present embodiment. Specifically, FIGS. 1A and 1B drive a second hydraulic cylinder 37 as a drive mechanism described later. It is the schematic which shows each case. FIG. 2 is a schematic view showing a main part of the embossing apparatus 1, and FIG. 3 is a plan view showing a screen 10 as a material to be processed by the embossing apparatus 1 according to the present embodiment.
The embossing device 1 is for forming irregularities on the surface of the screen 10 by embossing the screen 10 made of polyvinyl chloride. As shown in FIG. 1, the embossing device 1 includes a transport device 2 and a transfer device 3.
As shown in FIG. 3, the screen 10 processed in the present embodiment is formed with irregularities in an arc shape. The screen 10 is a reflective screen used in a projector (not shown) that projects image light from an obliquely downward position.

  As shown in FIG. 1, the transport device 2 includes a delivery roll 21, a heater 22, a heating roll 23, a support roll 24 as a support member, a plurality of guide rolls 25, and a take-up roll 26. The screen 10 is sent from the feed roll 21 to the take-up roll 26. Each roll 21,23-26 is provided with the rotating shaft 27 along the axial direction. The rotation shafts 27 of the feed roll 21 and the take-up roll 26 are driven by a motor (not shown).

The delivery roll 21 is configured to wind the screen 10 (illustrated with a two-dot chain line) in advance. The rotation shaft 27 of the delivery roll 21 is driven to rotate clockwise by a motor.
The heater 22 is disposed at a position facing the outer peripheral surface of the heating roll 23, and heats the screen 10 supplied from the delivery roll 21 at about 200 ° C.
The heating roll 23 sends the screen 10 heated by the heater 22 toward the support roll 24. When the screen 10 is heated, the emboss pattern is transferred satisfactorily by the transfer device 3. The heating roll 23 is preferably made of a material having high thermal conductivity.

The support roll 24 is fixed to the embossing device 1 by a rotating shaft 27 and is in contact with the transfer device 3 during the embossing. In addition, before and after embossing, the screen 10 needs to be attached and detached between the support roll 24 and the transfer device 3, so that the transfer device 3 moves closer to and away from the support roll 24. The support roll 24 is specifically a rubber roll.
The guide roll 25 guides and sends the screen 10 from the feed roll 21 to the heating roll 23 and from the support roll 24 to the take-up roll 26.
The take-up roll 26 winds the embossed screen 10. The rotary shaft 27 of the take-up roll 26 is driven to rotate clockwise by a motor, like the feed roll 21.

  As shown in FIG. 1, the transfer device 3 includes an electroforming mold 31 as a transfer sheet on which an emboss pattern is formed, a first rotating roll 32 as a rotating roll, and a second rotating roll 33 as a rotating roll. . The transfer device 3 presses the screen 10 by coming into contact with the support roll 24, and the electroforming mold 31 moves around the outer periphery of the first and second rotating rolls 32, 33, and the emboss pattern of the electroforming mold 31 is transferred to the screen. 10 is transferred.

  The electroforming mold 31 is a sheet material obtained by immersing an electroforming mother mold in an electrolytic solution made of a metal salt, depositing the metal salt on the surface of the mother mold by electrolysis, and peeling the deposited metal layer from the mother mold. In the electroforming mold 31, the irregularities on the surface of the mother die are copied. As shown in FIG. 2, a plurality of rectangular notches 311 are formed in the electroforming mold 31 along the longitudinal direction of both end edges. Projections (not shown) formed on the outer peripheral surfaces of both end edges of the rotary rolls 32 and 33 are engaged with the notches 311, and the electroforming mold 31 is wound around the rotary rolls 32 and 33. . The size of the electroforming mold 31 is determined according to the size of the screen 10. Then, the electroforming mold 31 is rotated counterclockwise by the rotation of the rotating rolls 32 and 33, and the screen 10 pressed by the electroforming mold 31 and the support roll 24 has an arc shape as shown in FIG. The embossed pattern is transferred.

The first rotating roll 32 includes a first rotating shaft 34 along the axial direction, and the first rotating shaft 34 is driven to rotate counterclockwise by a motor. The first rotating roll 32 comes into contact with the support roll 24 through the electroforming mold 31 and the screen 10. Further, as shown in FIG. 2, the first rotary roll 32 includes first hydraulic cylinders 36 at both ends of the first rotary shaft 34. The first hydraulic cylinder 36 moves the first rotating shaft 34 forward and backward in the radial direction so that the first rotating roll 32 approaches and separates from the support roll 24.
Before and after embossing, the first rotary roll 32 is separated from the support roll 24 and the screen 10 is disposed between the support roll 24 and the first rotary roll 32. Further, during the embossing, the first hydraulic cylinder 36 presses the first rotating shaft 34 in the radial direction, and the first rotating roll 32 comes into contact with the support roll 24 so that a certain pressure is applied to the first rotating roll. 32 to the support roll 24. As a result, the screen 10 is pressed against the electroforming mold 31 and the support roll 24, and the emboss pattern of the electroforming mold 31 is transferred to the screen 10.

  Similar to the first rotary roll 32, the second rotary roll 33 includes a second rotary shaft 35 along the axial direction, and the second rotary shaft 35 is driven to rotate counterclockwise by a motor. Further, as shown in FIG. 2, the second rotating roll 33 includes second hydraulic cylinders 37 at both ends of the second rotating shaft 35. As shown in FIGS. 1A and 1B, the second hydraulic cylinder 37 moves the second rotary shaft 35 forward and backward in the radial direction, thereby moving the second rotary roll 33 relative to the first rotary roll 32. Move close together. The dimensions to be closely spaced are determined according to the size of the electroforming mold 31. For example, even when the size of the electroforming mold 31 increases as the size of the screen 10 increases, the second hydraulic cylinder 37 is driven and the second rotating roll 33 and the first rotating roll 32 are separated, It is only necessary to adjust the position of the second rotary roll 33.

[Operation of embossing device]
The user winds the screen 10 around the feed roll 21 in advance. Prior to the embossing operation, as shown in FIG. 1, the screen 10 wound around the feed roll 21 is transferred to the take-up roll 26 along the guide roll 25, the heating roll 23, the support roll 24, and the guide roll 25. One end of the screen 10 is attached. At this time, by driving the first hydraulic cylinder 36, the first rotary roll 32 is separated from the support roll 24, and the screen 10 is disposed between the support roll 24 and the transfer device 3.

  On the other hand, the electroforming mold 31 corresponding to the size of the screen 10 is wound around the rotating rolls 32 and 33, and the second hydraulic cylinder 37 is driven to bring the second rotating roll 33 close to and away from the first rotating roll 32. And place it at a desired position. Then, the first hydraulic cylinder 36 presses the first rotating shaft 34 of the first rotating roll 32 in the radial direction to bring the first rotating roll 32 into contact with the support roll 24. As a result, the screen 10 is pressed by the support roll 24 and the first rotating roll 32.

  Next, when the embossing device 1 is operated, the rolls 21, 26, 32, and 33 of the transport device 2 and the transfer device 3 are driven by a motor, and the screen 10 is heated by the heater 22, and the heating roll 23 supplies the heated screen 10 toward the support roll 24. The screen 10 is pressed by the support roll 24 and the first rotating roll 32, and the emboss pattern of the electroforming mold 31 is transferred to the screen 10. The screen 10 to which the emboss pattern is transferred is wound around the winding roll 26.

According to the embossing device 1 of the present embodiment described above, the following effects are obtained.
Since the electroforming mold 31 is wound around the pair of rotating rolls 32 and 33 and the first rotating roll 32 is disposed opposite to the support roll 24 via the electroforming mold 31 and the screen 10, the long side of the enlarged screen 10 or The embossing pattern of the electroforming mold 31 can be transferred to the screen 10 without using a large-diameter embossing roll having a circumferential dimension corresponding to the short side dimension. That is, it is not necessary to use a large-diameter embossing roll, and the rotating rolls 32 and 33 having a small diameter are used. Therefore, the screen 10 can be embossed at a low cost and without increasing its size.

  Further, since the second hydraulic cylinder 37 is attached to the second rotating shaft 35 of the second rotating roll 33, the second rotating roll 33 is brought close to the first rotating roll 32 by driving the second hydraulic cylinder 37. Can be separated. That is, as the screen 10 increases in size, the electroforming mold 31 that is increased in size is wound around the rotary rolls 32 and 33 and the second hydraulic cylinder 37 is driven, so that the second position can be obtained at a desired position. The rotating roll 33 can be moved close to and away from the first rotating roll 32 to perform an embossing operation.

[Modification of Embodiment]
The best configuration, method, and the like for carrying out the present invention have been disclosed above, but the present invention is not limited to this.
For example, in the embodiment, the first rotating roll 32 is pressed against the support roll 24 by the first hydraulic cylinder 36, but the support roll 24 may press the first rotating roll 32.
In the above embodiment, the electroforming mold 31 is directly wound around the rotary rolls 32 and 33. However, a belt member is wound around the rotary rolls 32 and 33, and the electroforming mold 31 is covered on the surface of the belt member. You may attach as follows.

Moreover, in the said embodiment, although the screen 10 was processed by the embossing apparatus 1, processing objects are not limited to the screen 10, Paper, a metal thin plate, a plastic film etc. may be sufficient.
The screen 10 processed in the embodiment is a reflective screen, but is not limited thereto, and may be a transmissive screen.

In the embodiment, the second rotating roll 33 is moved closer to and away from the first rotating roll 32, but the first rotating roll 32 may be moved closer to and away from the second rotating roll 33.
In the said embodiment, although the support roll 24 was formed in the column shape, it is not limited to this, What is necessary is just to be able to support the electroforming mold 31, for example, prism shape may be sufficient.

  INDUSTRIAL APPLICABILITY The present invention can be used for an embossing apparatus that forms irregularities on a work material.

1 is a schematic view of an embossing apparatus according to an embodiment of the present invention. Schematic which shows the principal part of the embossing apparatus in the said embodiment. The top view of the screen processed with the embossing apparatus in the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Embossing apparatus, 10 ... Screen (member to be processed), 24 ... Support roll (support member), 31 ... Electroforming mold (transfer sheet), 32 ... First rotary roll (rotary roll), 33 ... Second rotary roll (Rotary roll), 37 ... second hydraulic cylinder (drive mechanism).

Claims (2)

An embossing device for embossing a work material,
An embossing pattern is formed, and a transfer sheet for transferring the embossing pattern to the work material;
A pair of rotating rolls around which the transfer sheet is wound;
A support member disposed to face one first rotating roll of the pair of rotating rolls,
The embossing apparatus, wherein the transfer sheet orbits the outer periphery of the pair of rotating rolls and transfers the emboss pattern to the material to be processed supported by the support member. In the embossing apparatus of Claim 1,
An embossing apparatus comprising: a drive mechanism that moves the second rotary roll of the pair of rotary rolls closer to and away from the first rotary roll.

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